Transactions of Materials and Heat Treatment

Title：Influences of deformation amount on microstructure and mechanical properties of 5056 aluminum bar in multi-pass drawing and reduced diameter rolling

Authors： Zhang Xiaohui Tan Chigao

Unit： Baotou Light Industry Technical College China Automobile Industry Engineering Co. Ltd.

KeyWords： 5056 aluminum bar multi-pass drawing reduced diameter rolling deformation amount mechanical properties

ClassificationCode：TQ133

year,vol(issue):pagenumber：2019,44(7):170-173

Abstract：

The deformation treatments of multi-pass drawing and reduced diameter rolling for 5056 aluminum bar were conducted, and the changes of microstructure and mechanical strength of 5056 aluminum bar were analyzed. The results show that the grains are elongated, and the grains are significantly refined as the drawing strain increasing to 2.0. When the 5056 aluminum bar is rolled under high deformation amount, a number of dislocation cells parallel to the rolled structure are formed in the matrix, and a layered grain dislocation substructure with a certain angle to the rolling direction is generated partly. However, the strength of pure aluminum increases with the increasing of drawing and rolling degrees, and the elongation decreases. After increasing the equivalent strain, the grain size is further refined to achieve the effect of strength increase. Thus, the strength is increased due to the influence of preferred orientation of grain during drawing and rolling.

Funds：

内蒙古自治区教科研规划课题（NZJGH2018072）

张晓晖（1973- ），女，硕士，副教授，E-mail：lidecao903208@126.com

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